Merging Ruijin's fix for issue #22 (rotate object not camera)

BezierView.html

@@ -45,7 +45,9 @@
 
 	<!-- The library for reading patches -->
 	<script src="js/read.js"></script>
-
+
+	<!-- The library for reading patches -->
+	<script src="js/ObjectControls.js"></script>	
 
 	<!-- The main renderer and starting point -->
 	<script src="js/render.js"></script>

js/ObjectControls.js

@@ -0,0 +1,350 @@
+/* Controller that move the object instead of the camera
+*
+*  Modified from the TrackBallControls in Three.js
+*
+*  Author: Ruijin Wu <cszwrj at gmail.com>
+*/
+
+THREE.ObjectControls = function ( object, camera, domElement ) {
+
+	var _this = this,
+	STATE = { NONE : -1, ROTATE : 0, ZOOM : 1, PAN : 2 };
+
+	this.object = object;
+	object.useQuaternion = true;
+
+	this.camera = camera;
+	this.domElement = ( domElement !== undefined ) ? domElement : document;
+
+	// API
+
+	this.enabled = true;
+
+	this.screen = { width: window.innerWidth, height: window.innerHeight, offsetLeft: 0, offsetTop: 0 };
+	this.radius = ( this.screen.width + this.screen.height ) / 4;
+
+	this.rotateSpeed = 1.0;
+	this.zoomSpeed = 1.2;
+	this.panSpeed = 0.3;
+
+	this.noRotate = false;
+	this.noZoom = false;
+	this.noPan = false;
+
+	this.staticMoving = false;
+	this.dynamicDampingFactor = 0.2;
+
+	this.minDistance = 0;
+	this.maxDistance = Infinity;
+
+	this.keys = [ 65 /*A*/, 83 /*S*/, 68 /*D*/ ];
+
+	// internals
+
+	this.target = new THREE.Vector3( 0, 0, 0 );
+
+	var _keyPressed = false,
+	_state = STATE.NONE,
+
+	_eye = new THREE.Vector3(),
+
+	_rotateStart = new THREE.Vector3(),
+	_rotateEnd = new THREE.Vector3(),
+
+	_zoomStart = new THREE.Vector2(),
+	_zoomEnd = new THREE.Vector2(),
+
+	_panStart = new THREE.Vector2(),
+	_panEnd = new THREE.Vector2();
+
+
+	// methods
+
+	this.handleEvent = function ( event ) {
+
+		if ( typeof this[ event.type ] == 'function' ) {
+
+			this[ event.type ]( event );
+
+		}
+
+	};
+
+	this.getMouseOnScreen = function( clientX, clientY ) {
+
+		return new THREE.Vector2(
+			( clientX - _this.screen.offsetLeft ) / _this.radius * 0.5,
+			( clientY - _this.screen.offsetTop ) / _this.radius * 0.5
+		);
+
+	};
+
+	this.getMouseProjectionOnBall = function( clientX, clientY ) {
+
+		var mouseOnBall = new THREE.Vector3(
+			( clientX - _this.screen.width * 0.5 - _this.screen.offsetLeft ) / _this.radius,
+			( _this.screen.height * 0.5 + _this.screen.offsetTop - clientY ) / _this.radius,
+			0.0
+		);
+
+		var length = mouseOnBall.length();
+
+		if ( length > 1.0 ) {
+			mouseOnBall.normalize();
+
+		} else {
+			mouseOnBall.z = Math.sqrt( 1.0 - length * length );
+
+		}
+
+		_eye.copy( _this.camera.position ).subSelf( _this.target );
+
+		var projection = _this.camera.up.clone().setLength( mouseOnBall.y );
+		projection.addSelf( _this.camera.up.clone().crossSelf( _eye ).setLength( mouseOnBall.x ) );
+		projection.addSelf( _eye.setLength( mouseOnBall.z ) );
+
+		return projection;
+
+	};
+
+	this.rotateObject = function() {
+
+		var angle = Math.acos( _rotateStart.dot( _rotateEnd ) / _rotateStart.length() / _rotateEnd.length() );
+
+		if ( angle ) {
+
+			var axis = ( new THREE.Vector3() ).cross( _rotateStart, _rotateEnd ).normalize(),
+				quaternion = new THREE.Quaternion();
+
+			angle *= _this.rotateSpeed;
+
+			var tQuaternion = new THREE.Quaternion();
+			tQuaternion.setFromAxisAngle( axis, angle );
+
+//			tQuaternion.normalize();
+			_this.object.quaternion.multiply(tQuaternion,_this.object.quaternion);
+			_this.object.quaternion.normalize();
+
+
+			quaternion.setFromAxisAngle( axis, -angle );
+
+
+			quaternion.multiplyVector3( _rotateEnd );
+
+			if ( _this.staticMoving ) {
+
+				_rotateStart = _rotateEnd;
+
+			} else {
+
+				quaternion.setFromAxisAngle( axis, angle * ( _this.dynamicDampingFactor - 1.0 ) );
+				quaternion.multiplyVector3( _rotateStart );
+
+			}
+
+		}
+
+	};
+
+	this.zoomObject = function() {
+
+		var factor = 1.0 + ( _zoomEnd.y - _zoomStart.y ) * _this.zoomSpeed;
+
+		if ( factor !== 1.0 && factor > 0.0 ) {
+
+			_this.object.scale.divideScalar(factor);
+
+			if ( _this.staticMoving ) {
+
+				_zoomStart = _zoomEnd;
+
+			} else {
+
+				_zoomStart.y += ( _zoomEnd.y - _zoomStart.y ) * this.dynamicDampingFactor;
+
+			}
+
+		}
+
+	};
+
+	this.panObject = function() {
+
+		var mouseChange = _panEnd.clone().subSelf( _panStart );
+
+		if ( mouseChange.lengthSq() ) {
+
+			mouseChange.multiplyScalar( _eye.length() * _this.panSpeed );
+
+			var pan = _eye.clone().crossSelf( _this.object.up ).setLength( mouseChange.x );
+			pan.addSelf( _this.object.up.clone().setLength( mouseChange.y ) );
+
+			_this.object.position.subSelf( pan );
+
+			if ( _this.staticMoving ) {
+
+				_panStart = _panEnd;
+
+			} else {
+
+				_panStart.addSelf( mouseChange.sub( _panEnd, _panStart ).multiplyScalar( _this.dynamicDampingFactor ) );
+
+			}
+
+		}
+
+	};
+
+	this.update = function() {
+
+		if ( !_this.noRotate ) {
+
+			_this.rotateObject();
+
+		}
+
+		if ( !_this.noZoom ) {
+
+			_this.zoomObject();
+
+		}
+
+		if ( !_this.noPan ) {
+
+			_this.panObject();
+
+		}
+
+		_this.object.matrixWorldNeedsUpdate = true;
+
+	};
+
+
+	// listeners
+
+	function keydown( event ) {
+
+		if ( ! _this.enabled ) return;
+
+		if ( _state !== STATE.NONE ) {
+
+			return;
+
+		} else if ( event.keyCode === _this.keys[ STATE.ROTATE ] && !_this.noRotate ) {
+
+			_state = STATE.ROTATE;
+
+		} else if ( event.keyCode === _this.keys[ STATE.ZOOM ] && !_this.noZoom ) {
+
+			_state = STATE.ZOOM;
+
+		} else if ( event.keyCode === _this.keys[ STATE.PAN ] && !_this.noPan ) {
+
+			_state = STATE.PAN;
+
+		}
+
+		if ( _state !== STATE.NONE ) {
+
+			_keyPressed = true;
+
+		}
+
+	};
+
+	function keyup( event ) {
+
+		if ( ! _this.enabled ) return;
+
+		if ( _state !== STATE.NONE ) {
+
+			_state = STATE.NONE;
+
+		}
+
+	};
+
+	function mousedown( event ) {
+
+		if ( ! _this.enabled ) return;
+
+		event.preventDefault();
+		event.stopPropagation();
+
+		if ( _state === STATE.NONE ) {
+
+			_state = event.button;
+
+			if ( _state === STATE.ROTATE && !_this.noRotate ) {
+
+				_rotateStart = _rotateEnd = _this.getMouseProjectionOnBall( event.clientX, event.clientY );
+
+			} else if ( _state === STATE.ZOOM && !_this.noZoom ) {
+
+				_zoomStart = _zoomEnd = _this.getMouseOnScreen( event.clientX, event.clientY );
+
+			} else if ( !this.noPan ) {
+
+				_panStart = _panEnd = _this.getMouseOnScreen( event.clientX, event.clientY );
+
+			}
+
+		}
+
+	};
+
+	function mousemove( event ) {
+
+		if ( ! _this.enabled ) return;
+
+		if ( _keyPressed ) {
+
+			_rotateStart = _rotateEnd = _this.getMouseProjectionOnBall( event.clientX, event.clientY );
+			_zoomStart = _zoomEnd = _this.getMouseOnScreen( event.clientX, event.clientY );
+			_panStart = _panEnd = _this.getMouseOnScreen( event.clientX, event.clientY );
+
+			_keyPressed = false;
+
+		}
+
+		if ( _state === STATE.NONE ) {
+
+			return;
+
+		} else if ( _state === STATE.ROTATE && !_this.noRotate ) {
+
+			_rotateEnd = _this.getMouseProjectionOnBall( event.clientX, event.clientY );
+
+		} else if ( _state === STATE.ZOOM && !_this.noZoom ) {
+
+			_zoomEnd = _this.getMouseOnScreen( event.clientX, event.clientY );
+
+		} else if ( _state === STATE.PAN && !_this.noPan ) {
+
+			_panEnd = _this.getMouseOnScreen( event.clientX, event.clientY );
+
+		}
+
+	};
+
+	function mouseup( event ) {
+
+		if ( ! _this.enabled ) return;
+
+		event.preventDefault();
+		event.stopPropagation();
+
+		_state = STATE.NONE;
+
+	};
+
+	this.domElement.addEventListener( 'contextmenu', function ( event ) { event.preventDefault(); }, false );
+
+	this.domElement.addEventListener( 'mousemove', mousemove, false );
+	this.domElement.addEventListener( 'mousedown', mousedown, false );
+	this.domElement.addEventListener( 'mouseup', mouseup, false );
+
+	window.addEventListener( 'keydown', keydown, false );
+	window.addEventListener( 'keyup', keyup, false );
+
+};